爆震管内火焰发展机理试验

为客观地了解爆震管内火焰燃烧发展变化的过程,首先设计了光电池测量系统,在同一截面上安装了高频响PCB压力传感器、离子探针和光电池。通过测量离子探针和光电池的触发时刻来验证光电池测量火焰信号的正确性,然后通过分析光电池信号的持续时间来间接获得单个截面处火焰燃烧的持续时间。结果表明:当爆震波传出爆震管后,管内仍在继续燃烧,且燃烧持续时间的量级为毫秒级。

Experiment on mechanism of flame evolution in detonation tubes

In order to study the process of flame evolution,photoelectric battery system was designed and pressure transducers,photoelectric battery and ion-probes were installed at a same section.Triggering time of photoelectric battery and ion-probes were measured to validate flame signals.Duration of photoelectric battery was analyzed to achieve duration of flame combustion in a same section.The results indicate that flame still existed inside detonation tube and time grade of duration was millisecond after detonation wave came out of detonation tube.